package strategic;

public class Main {
	public static void main(String[] args) {
		MallardDuck mallardDuck = new MallardDuck();
		mallardDuck.performFly();
		mallardDuck.performQuack();
		mallardDuck.setQuackBehavior(new MuteQuack());
		mallardDuck.performQuack();
	}
}
